Plastic cover for container

ABSTRACT

A plastic cover for a container includes a main body, and an anti-theft ring mounted on an end of the main body and having an inner wall provided with a plurality of catch plates each having a mediate section formed with a bent portion. Thus, the bent portion enhances the structural strength of each of the catch plates, so that each of the catch plates can be made with a smaller thickness, thereby decreasing costs of fabrication.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a cover, and more particularly to aplastic cover for a container.

2. Description of the Related Art

A conventional plastic cover comprises a main body mounted on the mouthof a container, an anti-theft ring mounted on an end of the main bodyand having an inner wall provided with a plurality of planar catchplates rested on the catch edge of the container, a plurality ofdiscontinuously arranged cutting seams formed between the main body andthe anti-theft ring, and a plurality of connecting bridges connectedbetween the cutting seams.

However, each of the catch plates has a greater thickness to provide anefficient structural strength, so as to prevent the catch plate fromdetaching the catch edge of the container, thereby increasing costs offabrication.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a plasticcover, wherein each of the catch plates of the anti-theft ring isprovided with a bent portion which distributes the transversecompressing force applied on the catch plate when the catch plate iscompressed by the transverse force, so as to enhance the transversestructural strength of each of the catch plates, so that each of thecatch plates can withstand a larger transverse stress and cannot be benteasily.

Another objective of the present invention is to provide a plasticcover, wherein the two wings of each of the catch plates are inclinedtoward different directions so as to enhance the longitudinal structuralstrength of each of the catch plates, so that each of the catch platescan withstand a larger longitudinal stress.

A further objective of the present invention is to provide a plasticcover, wherein the bent portion enhances the structural strength of eachof the catch plates, so that each of the catch plates can be made with asmaller thickness, thereby decreasing costs of fabrication.

A further objective of the present invention is to provide a plasticcover, wherein the connecting studs are mounted on the inner wall of themain body and the anti-theft ring, so that the continuously arrangedcutting seam is directly formed between the main body and the anti-theftring after the main body is integrally formed with the anti-theft ring,thereby simplifying the procedure of fabrication.

A further objective of the present invention is to provide a plasticcover, wherein the anti-theft ring is provided with a plurality offlexible connecting ribs for connecting the catch plates so as toenhance the structural strength of the anti-theft ring.

A further objective of the present invention is to provide a plasticcover, wherein the flexible connecting ribs are deformed when the catchplates are compressed by the transverse force so as to absorb thecompressing force applied on the catch plates.

A further objective of the present invention is to provide a plasticcover, wherein the two wings of each of the catch plates are rested onthe catch edge the container along two different inclined angles, sothat each of the catch plates of the anti-theft ring is combined withthe catch edge the container rigidly and closely, thereby enhancing thecombination strength of the anti-theft ring with the container.

In accordance with the present invention, there is provided a plasticcover, comprising:

-   -   a main body; and    -   an anti-theft ring mounted on an end of the main body and having        an inner wall provided with a plurality of catch plates each        having a mediate section formed with a bent portion.

Further benefits and advantages of the present invention will becomeapparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially cut-away plan cross-sectional assembly view of aplastic cover and a container in accordance with the preferredembodiment of the present invention;

FIG. 2 is a partially cut-away perspective cross-sectional view of theplastic cover in accordance with the preferred embodiment of the presentinvention;

FIG. 3 is a side plan cross-sectional view of the plastic cover as shownin FIG. 2;

FIG. 4 is a plan cross-sectional view of the plastic cover taken alongline 4-4 as shown in FIG. 3;

FIG. 5 is a partially cut-away perspective cross-sectional view of theplastic cover in accordance with another embodiment of the presentinvention;

FIG. 6 is a side plan cross-sectional view of the plastic cover as shownin FIG. 5;

FIG. 7 is a plan cross-sectional view of the plastic cover as shown inFIG. 6; and

FIG. 8 is a top plan cross-sectional view of the plastic cover and thecontainer as shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1-4, a plastic cover 13in accordance with the preferred embodiment of the present invention ismounted on a container 11. The container 11 has a top formed with amouth 12 having an outer wall formed with an outer thread 18 and anannular catch edge 25.

The plastic cover 13 comprises a main body 14, and an anti-theft ring15.

The main body 14 of the plastic cover 13 is mounted on the mouth 12 ofthe container 11 and has an inner wall formed with an inner thread 17screwed on the outer thread 18 of the container 11. The main body 14 ofthe plastic cover 13 has a first end formed with a closed face 16 and asecond end formed with an opening 160.

The anti-theft ring 15 of the plastic cover 13 is mounted on the secondend of the main body 14 of the plastic cover 13, and has an inner wallprovided with a plurality of catch plates 21 each bent toward the closedface 16 of the main body 14 of the plastic cover 13. Preferably, thecatch plates 21 of the anti-theft ring 15 are equally spaced from eachother.

Each of the catch plates 21 of the anti-theft ring 15 is substantiallyV-shaped. Each of the catch plates 21 of the anti-theft ring 15 has twoends formed with two wings 28 and a mediate section formed with a bentportion 22. The two wings 28 of each of the catch plates 21 are inclinedtoward different directions. Preferably, the bent portion 22 of each ofthe catch plates 21 of the anti-theft ring 15 is directed toward acenter of the anti-theft ring 15 as shown in FIG. 4.

The anti-theft ring 15 includes a plurality of flexible connecting ribs26 for connecting the catch plates 21 so as to enhance the structuralstrength of the anti-theft ring 15. In addition, the connecting ribs 26are deformed when the catch plates 21 are compressed by a transverseforce, so as to absorb the transverse compressing force applied on thecatch plates 21.

The plastic cover 13 further comprises a continuously arranged cuttingseam 23 formed between the main body 14 and the anti-theft ring 15, sothat the main body 14 is not separated from the anti-theft ring 15completely.

The plastic cover 13 further comprises a plurality of connecting studs24 mounted on the inner wall of the main body 14 and the anti-theft ring15. Each of the connecting studs 24 has a first end connected to themain body 14 and a second end connected to the anti-theft ring 15. Thus,each of the connecting studs 24 is passed through the cutting seam 23 toconnect the main body 14 and the anti-theft ring 15.

Accordingly, each of the catch plates 21 of the anti-theft ring 15 isprovided with a bent portion 22 which distributes the transversecompressing force applied on the catch plate 21 when the catch plate 21is compressed by the transverse force, so as to enhance the transversestructural strength of each of the catch plates 21, so that each of thecatch plates 21 of the anti-theft ring 15 can withstand a largertransverse stress and cannot be bent easily.

In addition, the two wings 28 of each of the catch plates 21 areinclined toward different directions so as to enhance the longitudinalstructural strength of each of the catch plates 21, so that each of thecatch plates 21 of the anti-theft ring 15 can withstand a largerlongitudinal stress.

Further, each of the catch plates 21 of the anti-theft ring 15 isprovided with a bent portion 22 which enhances the structural strengthof each of the catch plates 21, so that each of the catch plates 21 ofthe anti-theft ring 15 can be made with a smaller thickness, therebydecreasing costs of fabrication.

Further, the connecting studs 24 are mounted on the inner wall of themain body 14 and the anti-theft ring 15, so that the continuouslyarranged cutting seam 23 is directly formed between the main body 14 andthe anti-theft ring 15 after the main body 14 is integrally formed withthe anti-theft ring 15, thereby simplifying the procedure offabrication.

Further, the anti-theft ring 15 is provided with a plurality of flexibleconnecting ribs 26 for connecting the catch plates 21 to enhance thestructural strength of the anti-theft ring 15.

Further, the flexible connecting ribs 26 are deformed when the catchplates 21 are compressed by the transverse force, so as to absorb thetransverse compressing force applied on the catch plates 21.

Referring to FIGS. 5-7, a plastic cover in accordance with anotherembodiment of the present invention is shown, wherein the bent portion22 of each of the catch plates 21 of the anti-theft ring 15 is directedtoward the inner wall of the anti-theft ring 15 as shown in FIG. 7.

Referring to FIG. 8 with reference to FIGS. 1-4, when the anti-theftring 15 is combined with the container 11, the two wings 28 of each ofthe catch plates 21 are rested on the catch edge 25 the container 11with two different inclined angles, so that each of the catch plates 21of the anti-theft ring 15 is combined with the catch edge 25 thecontainer 11 rigidly and closely, thereby enhancing the combinationstrength of the anti-theft ring 15 with the container 11.

Although the invention has been explained in relation to its preferredembodiment(s) as mentioned above, it is to be understood that many otherpossible modifications and variations can be made without departing fromthe scope of the present invention. It is, therefore, contemplated thatthe appended claim or claims will cover such modifications andvariations that fall within the true scope of the invention.

1. A plastic cover, comprising: a main body; and an anti-theft ringmounted on an end of the main body and having an inner wall providedwith a plurality of catch plates each having a mediate section formedwith a bent portion.
 2. The plastic cover in accordance with claim 1,wherein the main body has an inner wall formed with an inner thread. 3.The plastic cover in accordance with claim 1, wherein the main body ofthe plastic cover has a first end formed with a closed face and a secondend formed with an opening.
 4. The plastic cover in accordance withclaim 3, wherein the anti-theft ring is mounted on the second end of themain body.
 5. The plastic cover in accordance with claim 3, wherein eachof the catch plates is bent toward the closed face of the main body. 6.The plastic cover in accordance with claim 1, wherein the catch platesof the anti-theft ring are equally spaced from each other.
 7. Theplastic cover in accordance with claim 1, wherein each of the catchplates of the anti-theft ring is substantially V-shaped.
 8. The plasticcover in accordance with claim 1, wherein each of the catch plates ofthe anti-theft ring has two ends formed with two wings which areinclined toward different directions.
 9. The plastic cover in accordancewith claim 1, wherein the bent portion of each of the catch plates ofthe anti-theft ring is directed toward a center of the anti-theft ring.10. The plastic cover in accordance with claim 1, wherein the bentportion of each of the catch plates of the anti-theft ring is directedtoward the inner wall of the anti-theft ring.
 11. The plastic cover inaccordance with claim 1, wherein the anti-theft ring includes aplurality of flexible connecting ribs for connecting the catch plates soas to enhance the structural strength of the anti-theft ring.
 12. Theplastic cover in accordance with claim 11, wherein the connecting ribsare deformed when the catch plates are compressed by a transverse force,so as to absorb the transverse compressing force applied on the catchplates.
 13. The plastic cover in accordance with claim 1, furthercomprising a continuously arranged cutting seam formed between the mainbody and the anti-theft ring, so that the main body is not separatedfrom the anti-theft ring completely.
 14. The plastic cover in accordancewith claim 13, further comprising a plurality of connecting studsmounted on the inner wall of the main body and the anti-theft ring. 15.The plastic cover in accordance with claim 14, wherein each of theconnecting studs has a first end connected to the main body and a secondend connected to the anti-theft ring, so that each of the connectingstuds is passed through the cutting seam to connect the main body andthe anti-theft ring.